Neha Patil (Editor)

78 Diana

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Discovery date  March 15, 1863
Aphelion  473.182 Gm (3.163 AU)
Semi-major axis  391.934 Gm (2.620 AU)
Orbits  Sun
Discoverer  Robert Luther
Minor planet category  Main belt
Perihelion  310.686 Gm (2.077 AU)
Discovered  15 March 1863
Spectral type  C-type asteroid
Named after  Diana
78 Diana httpsc1staticflickrcom146420020901812009a
Discovered by  Karl Theodor Robert Luther
Discovery site  Düsseldorf-Bilk Observatory
Similar  Robert Luther discoveries, Other celestial objects

78 Diana (dye-an'-a) is a large and dark main-belt asteroid. Its composition is carbonaceous and primitive. It was discovered by Robert Luther on March 15, 1863, and named after Diana, Roman goddess of the hunt. 78 Diana occulted a star on September 4, 1980. A diameter of 116 km was measured, closely matching the value given by the IRAS satellite.

Photometric observations of this asteroid during 1986 and 2006–08 gave a light curve with a period of 7.2991 hours and a brightness variation in the range 0.02–0.104 magnitude. Based upon radar data, the near surface solid density of the asteroid is 2.7+0.8
−0.5
g cm−3.

Diana is expected to pass about 0.003 AU (450,000 km; 280,000 mi) from (29075) 1950 DA on August 5, 2150. Main-belt asteroid 4217 Engelhardt (~9 km in diameter) will pass about 0.0017 AU (250,000 km; 160,000 mi) from (29075) 1950 DA in 2736.

References

78 Diana Wikipedia


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